Variable-speed hydraulic drive



Jan- 13 1948. H. B. BREEDLOVE VARIABLE SPEED HYDRAULIC DRIVE Filed Sept. 18 1942 Jan. 13, 194s. H, B, BRE-moya 2,434,545

y vYARIABLE SPEEDVHYDRAULIC. DRIVE Filed Sept. 18, 1942 7 Sheets-Sheet 2 Y Jin/My ifa-mors Jan. 13, 1948. DHB. BREEDLOVE 2,434,546

VARIABLE SPEED HYDRAULIC DRIVE Filed Sept. 18, 1942 '7 Sheets-Sheet 3 Jan. 13, 1948. H. B. BREEDLovE VARIABLE SPEED HYDRAULIC DRIVE Filed Sept. l18, 1942 7 Sheets-Sheet 4 Jan. 13, i948. H. a. BREEDLOVE VARIABLE SPEED HYDRULIC DRIVE 7 Sheets-Sheet 5 Filed sept. 18, 1942 INVENTOK f/HW Massacre Jan. 13, 1948.. H. B. BREEDLoyE 2,434,546

VARIABLE 'SPEED HYDRAULIC DRIVE Filed Sept. 18, 1942 '7 Sheets-Sheet. 6

F G. l 5. d 23d 37H Jan. 13, `1948. H, BREEDLQVE l $2,434,546

VARIABLE SPED HYDRAULIC DRIVE 'T Sheets-Sheet 7 @f SPW.. 18, 1942 INVENTOR. y ezfoLoa/f Patented Jan. 13, 1948 v 2,434,546 VARIABLE-SPEED HYDRAULIC DRIVE Harry B. Breedlove, of one-half to J. Tenn.

Baton Rouge, La., assignor H. Weatherford, Memphis,

Application September 18, 1942, Serial No. 458,794 28 Claims. (Cl. Bil-53) This invention relates to means for transmitting power through the intervention koi' a liquid from one shaft to another at speed ratios manually variable, or reversible at will.

Primarily it is based on the principle of utilizing two pumps, one discharging fluid and the other acting as a motor to receive and utilize the discharge from the iirst pump as an energizing force, and varying inversely the capacities of the two pumps to effect the desired variations in speed ratio, the rotor of the rst or' energizing pump being driven by one shaft, and the roter of the second or motor pump being mounted on the second shaft and transmitting its torque thereto.

The energizing pump preferably is of that well-` known type in which a head is turned in an eccentric casing, the head carrying memberslor blades which move outward and Vinward as the head turns to maintain sliding contact with the eccentric casing, and the motor is a reverse form of this pump in which an eccentric rotor turns in a chamber concentric with the shaft of the rotor, the chamber carrying blades which ride in sliding contact with the rotor and move outwardly and inwardly to maintain such contact as the rotor turns. l

The objects of the invention are:

To provide a transmission which will deliver power from a rotating drive shaft, either in the same or opposite directions of rotation, to a driven shaft initially at rest and in either case will build up the speed of the driven shaft smoothly and evenly by infinitesimal increments;

To provide a transmission which will accomplish such forward and reverse speed build-ups through an interposedr fluid under pressure;

To provide a transmission which will vaccomplish such lbuild-ups through direct liquid displacement without throttling;

To provide a transmission which will accomplish forward and reverse movements without inv tervention of gearing;

To provide a transmission in which speed ratios between driver and driven shaft may be changed by infinitesimal increments;

To provide means for counter-balancing a device of this character having an eccentric rotor;

To provide means for manually effecting shift of the parts to accomplish desired changes in speed ratio or direction.

The means by which the foregoing and other objects are accomplished and the manner of their accomplishment will readily be understood from the following specification on reference to the accompanying drawings, in which:

Figs, 1 to 5 inclusive are diagrammatic cross sections showing different positionings of the rotor and illustrating the underlying principles involved, Figs. 1 to 4A showing a shiftable driving head, a rotor shiftable in relation to the head and a casing concentric with the head', the parts being proportioned to limit the forward speed accomplished to that of the driving head and the reverse speed to about half such driving speed.

Fig. 5 discloses a similar cross section showing rotor and,casing diameters increasedrelatively.

. unable to discharge or take in liquid, the rotor is locked against creeping either forward or backward.

Fig. 2 shows the-thicker side of the rotor shifted toward the driving head to a mid-position, establishing around suchhead compartments of unequal size, and causing the head-and-ro'tor couple to function as a pump, and the pump discharge to act on the rotor-and-casing couple to drive the rotor forward at a speed related to but less than the driving-head speed.

Fig. 3 shows the thicker side of the rotor further shifted into contact with .the driving head, the parts being so proportioned that at such time the exterior of therotor is concentric with the interior of the casing and pump displacement by the driving headand-rotor couple cannot take place, the rotor thus necessarily moving as a unit with and at the speed of the driving head.

Fig. 4shows the rotor reversely shifted from neutral, as-related to Figs. 2 and 3, and away from the driving head until the thicker side of the rotor is in contact with the interior of the casing, effecting the limit of shift in reverse direction. In such shifted position, and all posltions' between neutral and such position, pump discharge acts on the rotor-and-casing couple to drive the,

rotor reversely at a speed related to, but less than the driving head speed.

Fig. 4A shows the parts positioned as in Fig. 4, but discloses thatfneither the body of the driving head need be cylindrical, nor the bore ofv the casing cylindrical.

Fig. 5 shows the rotor shifted, as in Fig. 3, un-

y assetto ai in contact with the drivinr neas.' y

- in and .centered bythe hoed.

however, being so proportioned that'at vsuchtixrie the exterior of the rotor has passed conoentricity with the interior of the casing, and pump displacement by the driving head rotor couple drives the rotor forward relatively to the driving head. at relatively increased speed.

Fig, 6 is a longitudinal sectional elevation, on a larger scale than the preceding figures, of one form of the device. l

Fig. 7 is a fragmentary side elevation of the rotor shift mechanism and counterweight, shown in sectional elevation in Fil. 6.

Fig. 8 is a fragmentary section taken as on the line VIII-VIII of Fig. 6. showing mounting and housing of one of the casing blades.

Fig. 9 is a sectional end elevation taken on the line IX-IX of Fig. 6.

Fig. 10 is a similar sectional end elevation taken as on the line X-X of Fig. 6.

Fig. 11 is an end elevation of a rotor, broken away in part to show slotting of the rotor, the rotor having been turned in this view ninety degrees from the position shown in the preceding figures.

Fig. 12 is a sectional elevation on the line XII- XII f F1511.

Fig. 13 is a fragmentary sectional plan taken on the line XIII-XIII of Fig. 6.

Fig. 14 is a sectional elevation, corresponding to Fig. 6, showing a. modified form of the device in which two oppositely shiftable rotors are employed to effect counterbalance.

Fig. 15 is a sectional elevation taken as on the line XV-XV of Fig. 14, with a dual key drive between the rotors and the annular diaphragm.

Fig. 16 is a sectional end elevation taken as on the line XVI-XVI of Fig. 14. showing a modifled blade construction.

Fig. 17 is a fragmentary corresponding sectional view showing shoe equipped blades.

In all the views. except Figs. 16 and 17, it has been elected to show only forms of pump and motor which employ radially shiftable blades, though it will be understood that other forms of blades well known in the rotary pumping art, as

the bucket type shown in Fig. 16, may -be employed should it be so desired.

Referring now to the drawings in which the various parts are indicated by numerals:

I is a driving shaft to which power is imparted in any usual or desired manner, and I1 a driven shaft to which drive torque is to be transmitted from the shaft I5, these two shafts being in axial alinement.

Mounted on the shaft I5 is a drum I9, hereinafter designated as a driving head, this drum being integral with or rigidly secured to the shaft I5asbyakey2I,Figs.1t05.

The driving head I9 is disposed in an annular casing 23 preferably concentric with the shaft I5 and driving head, and having end walls 25, 21, one end of the driving head being in smooth rotary sliding contact with the wall 25. At least one of the walls, as the wall 25, is removable to permit assembly and is secured in place as by cap screws 29. The driving shaft I5 projects from the casing through the end wall 25, and is Journalled in such end wall, and otherwise las may be desired, and the shaft I1 projects oppositely through the opposite wall 21 and is journalled therein and otherwise as desired. 3l is a stufllng box for the shaft I5, and 33 a stumng box for the shaft I1. Preferably the shaft I5 terminates, as at I5E, short of the end of the head I9 and the "u t iur.' into'. ma u www v- Disposed-in the ming .round the driving hun Il is an annular rotor 35 which has its opposite ends insliding contact with the heads 25 and 21. This rotor is exteriorly and inieriorly cylindrical, the inner and outer surfaces being relatively eccentric, establishing a comparatively thin wall portion 35 on oneside and a very much thicker diametrically opposite wall portion 31 on the opposite side, this latter wall Portion being preferably hollow to reduce eccentric weight. This eccentric annular structure is closed at one end by a disc-like wall 39 which preferablyforms a complete closure for that end of the rotor, unless the shaft I1 is extended as to I'IE, Fig. 6, in which case it has a slotted opening 4l which closely embraces opposite sides of the shaft, but is elongated in the direction of the axial plane of greatest eocentricity of the rotor to permit shift of the rotor in that plane toward and away from the shaft. The inner surface of the wall 39 is fiat and in sliding contact, both rotary and radial, with the outer end of the driving head I9, and its outer surface. also fiat, is in sliding contact with the inner surface of the head 21.

Concentrically around the shaft I1, the casing wall 21 has an outwardly domed portion 28 forming a chamber 4I for shift mechanisms.

The driving head I! is provided, in the usual manner of rotary pumps of this general type. with a plurality of blades 43 which extend from end to end of the head and slidably contact the end wall 2l of the casing. and the end wall 39 of the rotor, these blades being here shown as mounted to slide radially outward into engagement with the bore of the rotor 35 under action of centrifugal force due to rotation of the head. Similarly the casing 23 is provided with inwardly sliding blades 45, extending from end wall 25 to end 'wall 21 of the casing, these blades being here shown as radially disposed, and inwardly urged, Figs. 7 and 8. as by compression springs 41, into contact with the exterior cylindrical surface of the rotor 35. The number of casing-carried blades may be different from the number of drum-carried blades, as ilve blades in the casing and four blades in the head, such unequal numbers apparently promoting smoothness of action.

It will be understood that the head-carried blades 43 may be urged outward by springs similar to the springs 41 should it be desired or found necessary.

The rotor 35 is provided/with openings connecting the bore and the casing. Theseopenings may be of such shape as desired, but preferably are opposite circumferential slots 49, 50, there being necessarily one pair of such slots, and if the rotor be long, two or even more such pairs, only one pair, however, being shown. The slotl establish communication for transfer of liquid from the interior to the exterior of the rotor and concurrent reverse supply flow from the exterior to the interior. They are symmetrically disposed on diametrically opposite sides of the diametral plane of greatest eccentricity of the rotor, this being the plane which passes through the center of the thickest and thinnest portions of the rotor shell. The thicker and thinner portions of the rotor between these slots are both imperforate, the circumferential span of the imperforate portions along the exterior of the rotor being sufficient to overlap adjacent'palrs of the casing-carried blades 45, and the circumferential span interiorly sumcient to overlap adjacent particularly where a reasonably heavy oil is pairs of the drivinghead blades 43. The rotor, as shown in Figs.l 11 and 12. may have exteriorly a pair of circumferential rings M mounted on ball bearings 44A, on which rings the casing-carried blades seat, the rings shifting with 4the blades and reducing friction. It will be understood that ring projection beyond the circumferential face of the rotor is of the nature of one one-thousandth of an inch and will interfere little if at all with seal of the blades with the rotor face, used.

Integral with the rotor wall 39, and extending into the chamber 4I are ribs 53 which are spaced equally outward from the diametral plane of greatest eccentricity of the rotor. The shaft I1 carriesa T-head 55 which is slidably disposed between these ribs, constraining the shaft and rotor to rotate as a unit, and acting to transfer the rotor torque to the shaft I1.

slidably disposed on the'shaft I1 is a collar 51 which is preferably provided with diametrically oppositely extending pins 59 and an annular groove 5I. Integral with the T-head 55 is va bracket arm 63 which carries a transversely disposed pin 65 on the opposite ends of which are mounted bell crank levers 51 which preferably are integrally connected, as by portions 51X. These bell crank levers have forks 69 which engage the pins 59 and their opposite legs carry a transverse pin 1I which engages slots 'I3 in the ribs 53. the mounting of the'bell crank levers being effective to shift the rotor 35 radially with respect to the axis of the casing toward and from the driving head I9 on shift of the collar 51 along the shaft I1 away from or toward the rotor 35.

Disposed within the chamber 4I is a shift fork which carries pins 11 oppositely engaging the groo-ve 6l on and secured, as by a key 19, to a transverse in the collar 51. This fork is mounted shaft 8| which is suitably turnable in the wall 28 of the chamber 4I and which extends outward through such wall. At its outer end, the shaft 8| is preferably squared to engage the hub of a shift arm 93.` By the above mechanism, yshift of the arm 83, as manually. moves the collar 51 away from or toward the rotor, as the case may be, along the shaft I1 and effects related radial shift of the rotor 35 relatively toward or away from the driving head.

Extending from the diametrically opposite end of the T-head 55 is a second bracket 85 which carries a transversely disposed pin 81 on which is mounted a counter-balance weight 89, 4. this counter-balance weight having opposite arm'portions 89A spaced apart to embrace the bell crank lever arms 61 and engage with the pins 59 carried by the collar 51 so that movement of the collar shifts the counter-balance weight 89 radially in opposite direction to the shift of the rotor 35- and substantially maintains counter-balance of the rotor.

.tudinal center line and groove.

` bore and periphery of f way bridging surfaces 6 shafts. Mounted on the shaft IBA is a driving head I9A, which is keyed to the shaft by a key 92. Preferably the shaft ITA extends into and is journalled in this head.

35A, 35B are the rotors which are of substantial identity with the rotors 35. except that each carries lugs or keys. the rotor 35A carrying keys 36X. 31X, and the. rotor 35B keys 35Y, 31Y, extending beyond the facing ends of the rotors. These rotors are so disposed that the thick wall portion 31A of the one is on the diametrically opposite side of the shafts from the thick wall portion 91B of the other. The casing is symmetrical about its longiidentical halves 23A. 23B. provided with facing flanges 23C, 23D, secured together as by bolts 29A, .each half being of substantial identity with the casing 23, except for theend wall 25.

The blade structure and action and the shift mechanism within the opposite shift chambers of the casing are also identical, except that the mechanism for shifting rotor 35B relative to rotor 35A, effects the shift in diametrically opposite directions. The brackets 53B. 85B, however, which respectively carry the bell crank arms 61B and theweight SIB, are carried by the T-head B which may include a hub portion 55C. and which is mounted to turn on the shaft I5A and is constrained to turn with the rotor 35B by the ribs 53B.

The casing is segregated longitudinally into identical working chambers by an annular rotatable diaphragm ZEA, which is bored out to closely but rotatably fit the head and form an end closure for each of the two halves, and which corresponds in this respect to the end wall 25. The diaphragm peripherally has an annular rib 25B which extends beyond the bore of the chambers 23A, 23B into an annular groove 23Econcentric with the shaft I5A, and preferably formed equally in the flanged ends of the two casing halves, the diaphragm being rotatably mounted in such The diaphragm 25A is provided with diametrically alined key-ways 93, 93A. facing the rotor 35A, and on its opposite face with similar keyways 95, 95A, also in diametricai alinement, and in parallelism with the key-ways 93, 93A, these key-ways preferably terminating short of the the diaphragm leaving key- 25C, 25D adjacent the head and casing against which the ends of the blades In Fig. 14, a modified form of the device is ISA, I1A, are respectively the driving and driven 75 ride in passing the key-ways. The keys 39Y, 31Y of the rotor 35B are disposed along the diametral plane of greatest eccentricity of the rotor 35A and are respectively slidably disposed in the key-ways 95, A, of the diaphragm 25A constraining the diaphragm to turn with the rotor 345B. Similarly the keys 36X, 31X of' the rotor 35A, slidably engage the key-ways 93. 93A of the diaphragm, coordinating turning movement of the rotor 35A with the diaphragm and the rotor 35B and enabling the rotor 35B, through the diaphragm and rotor 35A, to transmit its driving torque to the shaft I'IA,

Pressurein the two halves-of the rotor may be y equalized by establishing leak ports from each compartment respectively of one pump chamber to the diagonally opposite compartment of the other pump chamber. In Fig. 14 and Fig. 15, openings 98, 98A, 95B and 98C are shown estab- 'lishing a typical passageway through the driving head I 9A from pump compartment ofthe chamber half 23A to the diagonally opposite pump comprises substantiiauly chamber of the chamber half 23B, only one being shown since the passageway is typical. Y

Shift of the rotor 33A is accomplished as was shift of original rotor 33, by arm 33A exterior to the casing through shaft IIA and arms 13A, pins 11A, collar 31A and bell crank 31A. 33 is a link, coupling the arm 83A to a second arm lill. This latter arm is keyed or otherwise secured to a shaft BIB. which carries shift fork 13B, which, as before described, for corresponding parts, shifts collar 31B, bell crank 31B, and through ribs 33B. the rotor 33B. Movements of the two rotors 33A, 33B and their respective radially movable parts, are in opposite directions relatively to the shaft, and at all times maintains absolute ro tational balance.

In Fig. 15, two sets of key-ways |03, ill3A. |33, I03A in the annular diaphragm 23E have been substituted for the single pair of key-ways 33,4

33A, the'se key-ways being spaced apart in excess of the distance apart of pairs of blades 43A, 43A in the head and casing respectively, and the rotor 33A is provided with complementary keys |31, |01A, |09, i09A. in lieu of the single pair of keys 33X, 31X, the sectioning of the keys, in Fig. 15,

being made heavier than adjacent sectining to emphasize them. Similar keys and key-ways are on the rotor 35B and opposite face of the diaphragm.

The use of thedouble set of keys obviates anyY` possible chance that there might be momentary checking of pressure action when either a casing blade or a head-carried blade is passing a keyway.

In Fig. 16, parts heretofore described have been given the same numerals with the designating sumx Y. Arcuately shiftable head and casingcarried blades 43Y and 45Y respectively, of what are known as "bucket type have been substituted for the radial blades 43 and 43 before shown.

Vso

The head iSY has been modified to accommodate the changed blade construction and the casing 23Y similarly modified. No change is shown in the rotor 35Y from that originally shown. No change in the shift mechanism or other parts is here contemplated.

In Fig. 17, blades 43Y and 43Y are shown equipped with shoes 43Z, 43Z respectively, which shoes are mounted to rock on the blade edges and arcuately conform to the inner and outer surfaces of the rotor 33Y. Obviously similar shoes may be used with the radial blades 43 and 43 shown.

In making use of the invention, the driving shaft i5 is coupled to a suitable prime mover, .or other source of power, and the shaft i1 to the mechanism to which power is to be delivered.

The entire space within the casing 23 exterior to the driving head i9 is filled with oil or other liquid of desired viscosity as through a suitable filling opening Ill5, it being necessary if a single lling opening is used to turn the driving head until all of the compartments are completely filled.

After filling, the lever 83, or 33A of the double rotor type, is shifted to bring the bore of the rotor 35 into concentricity with the driving head I9, Fig. 1, this centralized or neutral positioning, inherently establishing a spacing between the thicker portion 31 of the rotor and the yinterior of the casing relatively much more restricted than the spacing between the thin portion 3S of the rotor and the casing. With such positioning, the driving head turning in a concentric chamber will have no tendency to either push liquid from liquid between the unequal size compartments and the compartments K, L, M, N, cannot occur. With the driving head at speed, shift of the lever 33 to the right in the direction of the arrow A, Fig. 6, acting through the shaft 3i, an'dfork 13,

will shift the collar 31 away from the rotor 33.

This shift, acting through the bell crank lever 33,

moves the thicker part 31 of the rotor toward the driving head I3, as in Fig. 2, and away from the surrounding casing, and the thinner part 3l of the rotor away from the head toward the casing, it being noted that because of the engagement of the pin 11 of the fork 13 with the groove 3l of the collar 31,'and regardless of what rotational position the rotor or driving head may have with regard to thev arm`33. or the casing 23, the movement of the rotorl with respect to the head and the casing will be the same.

This movement continued, eventually, as in Fig. 3, brings the exterior of the rotor concentric with the bore of the casing, in which position the compartments exterior to the rotor are of equal size and liquidcannot be forced thereinto from the rotor and the driven shaft must turn at the same speed as the driving shaft. Preferably the parts are so proportioned that at this time the bore of the rotor seats against the head i3 and further movement cannot occur.

It is possible, as shown in Fig. 5, to so proportion the parts that shift of the thicker side 31 of the rotor away from the casing bore is made past concentricity in which case, the driving head and rotor moving as a couple as over-shift begins, over-drive of' the rotor is accomplished.

Also from the neutral position of Fig. l, shift of the lever 33 oppositely to the arrow A, moves the thin side 33 of the rotor 33 toward the head i3, as in Fig. 4, and the heavy side 31 toward the casing, establishing a reversal of the action of the rotor discharge and accomplishing reversal of driving torque on the driving shaft.

In all the sluit positions of the rotor 33, except direct speed, Fig. 3, the blades 43 of the head are changing position around the bore of the rotor, and in all positions, except neutral, Fig. 1, the rotor is changing position with regard to the blades 43 of the casing..

Action of the head-carried blades 43 in cooperation with the interior of the rotor, as most clearly shown in Fig. 2, with the head I8 turning clockwise, is to force liquid from compartments K2 and L2, decreasing in size, or waning, through port 49 and drawing liquid through port 30 into compartments M2 and N2 increasing in size, or waxing. Liquid is discharged into compartments S2 and T2, exerting its thrust on the rotor 33 to shift the rotor clockwise and permit such discharge. Concurrently waning compartments M2 and N2 drawing in liquid from compartments Q! and R2 necessarily exert similar pull on the rotor to fill up the otherwise evacuated spaces.

Obviously there is no discharge from or flow into compartments K, L, M, and N, in the neutral position of Fig. l, primarily because inflow cannot take place into the completely filled compartu ments M, and N. As diametral shift of the thicker side 31 of the rotor toward the head begins, however, infinitesimal increments of discharge and intake begin which very slowly turns the rotor 35, this discharge increasing in rate as pump eccentricity increases, and rotor eccentricity decreases, the rotor turning speed increasing toward driving speed until the exterior of the rotor becomes concentric, as in Fig. 3, at which time discharge from the driving head is blocked and the rotor must turn with it at driving speed.

In reverse shift, Fig. 4, M4 and N4 becomes the waning pump compartments, forcing the liquid through port 50 into waxing compartments Q4 and R4 and turning the rotor 35 counter-clockwise and reversely to the rotational direction of the driving head I9.

It is obvious that the rotor 35 is constantly turning, either in forward or reverse drive, with respect to the casing 23, so that the port 49. for example, establishing communication with compartments S2, T2, rapidly changes to T2, P2, then P2, Q2; Q2, R2; R2, S2, S2, T2, ad infinitum, but it will be noted that as these changes occur these compartments concurrently become waxing compartments and automatically promote the desired cycle.

It will be noted that in neutral, Fig. 1, the head I9 and its blades 43 with the trapped fluid content are the only moving part and except for friction of the blades onthe then concentric bore of the rotor there is no resistance to turning movement of the head, and no radially shifting parts.

It will also be noted that in direct drive, Fig. 3, there are no radially shifting parts, the rotor turns in a static bath of liquid, and the only frictional resistance is the sliding friction of the smooth surfaces of the rotor.

The torque impressed on the rotor 35 is transferred from the rotor through the ribs 53 to the T-head 55 of the driven shaft I1. There is no shift of the ribs relatively to the T-head other than that manually made to effect change of speed ratio, and none arising from turning movement; at any intermediate speed ratio, and at direct speed, the rotor 35 and shaft I 'I turn together as though rigidly secured.

The above description is applied to the single rotor type of Fig. 6. but it equally applies to the dual rotor type of Fig. 14. In such dual type the two rotors 35A, 35B are identically driven by the head I9A as is the rotor 3-5 just described by the head I9, rotation of the head I9A exerting substantially equal torque on both thereof. The rotor 35B transmits its torque through the keys 36Y, 3`IY, (or the dual sets of keys |01, III1A; IDS, IBSA, of Fig. l) to the diagram 25A, the diaphragm delivers its torque through the keys 36X, 31X to the rotor 35A, and the rotor 35A through the ribs 53A and T-head 55A delivers its own torque, and that transmitted to it from the rotor 35B to the driven shaft I'lA. At any intermediate speed ratio, and at direct speed, the two rotors 35B, 35A, diaphragm 25A, and driven shaft I 1A, turn as a rigid unit.

I claim:

1. A transmission device including a driving head and an axially alined driven shaft, an annular casing concentric with said head and shaft, enclosing and spaced from said head. to form an annular chamber therearound. an annular Y rotor, having an externally cylindrical shell of less diameter than said chamber and an eccentric cylindrical bore of greater diameter than said head, disposed in said chamber and around said head, opposite sectors of said shell spaced from the axial plane of greatest eccentricity of said shell being apertured to form intake and discharge ports, means carried by said head in sliding and sealing contact with the bore, of, said rotor, adapted to cooperate with said shell to effect pumping inflow to, and discharge from, said shell, means carried by said casing in sliding and sealing contact with the outer surface of said shell, adapted to cooperate with said shell to utilize said inow and discharge to eiect motor drive on said shell, means for diametrically shifting said rotor along its axial plane'of greatest eccentricity to vary eccentricity thereof relatively to said head and casing, and means for effecting driving coupling of said rotor to said driven shaft in all positions of rotor shift.

2. A transmission device including a driving head and an axially alined driven shaft, an annular casing concentric with said head and shaft, enclosing and spaced from said head, to form an annular chamber therearound, an annular rotor, having an externally cylindrical shell of less diameter than said chamber and an eccentric cylindrical bore of greater diameter than said head, disposed in said chamber and around said head, thinner and thicker opposite sectors of said shell being imperforate, and oppositely, between said sectors, said shell being apertured to form intake and discharge ports, means carried by said head in sliding and sealing contact with the Abore of said rotor, adapted to cooperate with said shell to effect pumping inflow to, and discharge from, said shell, means carried by said casing in sliding and sealing contact with the outer surface of said shell, adapted to cooperate with said shell to utilize said iniiow and discharge to effect motor drive on said shell, means for shifting said rotor along its axial plane of greatest eccentricity to vary eccentricity of said rotor relatively to said head and casing, and means for effecting driving coupling of said rotor to said driven shaft in al1 positions of rotor shift.

3. A transmission device including a driving head and an axially alined driven shaft, an annular casing concentric with said head and shaft, enclosing and spaced from said head to form an annular chamber therearound, an annular rotor, having an externally cylindrical shell of less diameter than said chamber andan eccentric cylindrical bore of greater diameter than said head, disposed in said chamber and around said head, oppositely between the thinner and thicker sectors, the sides of said shell being apertured to form intake and discharge ports, means carried by said head in sliding and sealing contact with the bore, of said rotor, adapted to cooperate with said shell to effect pumping inflow to, and discharge from, said shell, means carried by said casing in sliding and sealing contact with the outer surface of said shell, adapted to cooperate with said shell to utilize said inow and discharge to effect motor drive on said shell, means for shifting said rotor along its axial plane of greatest eccentricity to vary eccentricity of said rotor relatively to said head and casing, means for eifecting driving coupling of said rotor to said driven shaft in all positions of rotor shift, counter-balance means shiftably carried by said driven shaft, and means coupling said counterbalance means to said rotor shift means for accomplishing diametrically opposite shift of said counter-balance relatively to said rotor.

4. Ajtransmission device including a driving Yshaft and an axially alined driven shaft, a driving head secured'ongsaid driving shaft, a casing includingend walls and an annular shell concentric with said shafts, enclosing an end portion of-said driven shaft, and enclosing and spaced radially from said head to form an annular chamber therearound, a radially shiftable rotor, disposed in said casing around said head, dividing said chamber progressively outward from said head into pump and motor chambers, said rotor including a discend and an annular shell having a bore eccentric to its'outer surface, said shell intermediate the thicker and thinner portions thereof, being oppositely apertured to establish ports communicating said pump and motor charnbers, pump blades carried by said head effecting sealing contact with the bore and end of said rotor, and an end of said casing, motor blades carried by said casing effecting sealing contact with saidcasing end walls and the outer surface of said rotor shell, means, including rotor carried parts laterally shiftable with said rotor relatively to said driving shaft, effecting driving coupling between said rotor and said driven shaft; and means for shifting said rotor radially to vary eccentricity of said pump chamber and concurrently inversely vary eccentricity of said motor chamber.

5. A transmission device including a driving shaft and an axially alined driven shaft, a driving head secured on said driving shaft, a casing in cluding end walls and an annular' shell concentric with said shafts, enclosing an endy portion of said driven shaft and enclosing and spaced radially from said head to form an annular chamber therearound, a radially shiftable rotor, disposed in said casing around said head dividing said chamber progressively outward from said head into pump and motor chambers, said rotor including a disc end and an annular shell having a bore eccentric to its outer surface. said shell being oppositely apertured between the thicker and thinner portions thereof to establish ports communicating said pump and motor chambers. pump blades carried by said head in sealing contact with the bore end of said rotor and an end of said casing, motor blades carried by said casing in sealing contact with said casing end walls and the outer surface of said rotor shell, means, including rotor carried parts laterally shiftable with said rotor relatively to said driving shaft, effecting driving coupling between said rotor and said driven shaft; a counter-weight carried by said driven shaft and laterally shiftable toward and away therefrom, and means for shifting said` rotor radially to vary eccentricity of said pump `chamber and concurrently inversely vary eccentricity of said motor chamber, and means coupled to said rotor shifting means for shifting said counter-weight in a laterally opposite direction to said rotor shift.

6. A hydraulic transmission, including a driving shaft and an axially alined driven shaft, a head secured on and rotated by said driving shaft, a casing disposed around said head, a cylindrical rotor having aneccentricbore disposed around said head and within said casing, segregating in said casing a pump and a radially outward motor chamber, means establishing passageways for fluid discharge and intake iiow between said chambers, means coupling said rotor to said driven shaft for radial shift along the diametral plane of greatest eccentricity of said rotor, means carried by said head cooperating with the bore of said rotor to divide said pump chamber into a plurality of sectors, means carried by said casing cooperating with the exterior of said rotor to divide said motor chambers into a plurality of sectors, and manually operable means for shifting said rotor with respect to said driven shaft, and concurrently along said diametral planewith respect to said head and said casing, to vary inversely the eccentricities of said pump and motor chambers.

7. A hydraulic drive, including a driving shaft journalled in said casing. head carried by said driving shaft and cooperating with said casing to establish an annular chamber, fn annular rotor having a cylindrical exterior surface and an eccentric bore, rotatably disposed in said casing, said rotor cooperating with said casing to establish in said chamber, pump and motor compartments respectively adjacent said head and said casing, and being oppositely apertured to permit discharge flow from said pump compartment to said motor compartment and return flow from said motor compartment to said pump compartment. pumping blades carried by said head in cooperating relation with the walls of said pump compartment, motor blades carried by said casing in cooperating relation with the walls of said motor compartment, a driven shaft iournalled in said casing, means, including means disposed along the diametral planeof greatest eccentricity of said rotor, effecting driving coupling of said rotor to said shaft, and means for shifting said rotor to vary eccentricity of said rotor relatively to said head and casing, while maintaining driving coupling of said rotor to said driven shaft.

8. A hydraulic drive, including a. driving shaft. a casing around and journalling said shaft, a head carried by said driving shaft, and cooperating with said casing to establish an annular chamber, an annular rotor having a cylindrical exterior surface and an eccentric bore, rotatably disposed in said casing, said rotor cooperating with said casing to establish in said chamber. pump and motor compartments respectively adjacent said head and said casing, and being oppositely apertured to permit discharge flow from said pump compartment to said motor compartment and return ow from said motor compartment to said pump compartment, pumping blades carried by said head in cooperating relation with the walls of said pump compartment, motor blades carried by said casing in cooperating relation with the walls of said motor compartment, a driven shaft alined with said motor shaft jour; nailed in said casing, means disposed along the diametral plane of greatest eccentricity of said rotor effecting shiftable driving coupling of said rotor to said shaft, counter-balance means carried by said driving shaft, and diametrally opposed to the thickest portion of said rotor shell, and means for diametrally shifting said rotor to vary eccentricity of said rotor relatively to said head and casing, and for coordinately oppositely shifting said counter-balance means.

9. A hydraulic drive, including a casing, a driving shaft journalled in said casing, a head carried by said driving shaft and cooperating with said casing to establish an annular chamber, an annular rotor having a cylindrical exterior surface and an eccentric bore, rotatably disposed in said casing, said rotor cooperating withsaid casing to establish in said chamber, pump and motor compartments respectively adjacent saidhead and said casing, and being oppositely apertured to permit discharge and return iiows between said pump and motor compartments, pumping blades an annular casing, a

13 14 Carried by Seid head in Cooperative sealing relewith said first end wall, and said disc end, said tion With the end Walls Of Seid Dump compartblades being mounted in said head for outward ment. means, which may be centrifugal force. and inward movement in sealing contact with urging said pumping blades into sealing Contact said rotor bore, means, which may be centrifuged with the bore of said rotor, motor blades carried force, for maintaining said blades in said bore by said casing in cooperative sealing relation with contact; blades, having their opposite ends in the end walls ofl said motor compartment, means respective sealing contact with said casing end urging said motor blades into sealing contact with walls, mounted in said annular casing wall for the exterior surface of said rotor, a driven shaft inward and outward movement in contact with journalled in said casing, means disposed along said outer rotor surface, and means maintaining thel dametlal Plane of greatest eCCeIltIl'qLf-r VIY`- said-blinkies in sealing contact with said surface: said rotor effecting shiftable driving coupling of the second said end wall extending inward from said rotor to said driven shaft, and' means for said annular casing into overlapping relation with diametrally shifting said rotor to vary eccentricity said rotor disc to effect said sealing contact thereof said rotor relatively to said head and casing. ,l5 with, and concentrically with said shaft, being 10. A hydraulic drive, including an annular offset longitudinally away from said disc to form casing, a driving shaft iournalled in said casing. a shift chambena driven shaft axially alinedwith a. head carried by said driving shaft, and coopersaid driving shaft, journalled'in and extending ating with said casing to establish an annulai through said offset end wall into substantiallyv chamber, an annular rotor having a cylindrical abutting relation with said rotor disc,;-diametrally exterior surface and an eccentric bore, rotatably shiftable means coupling said rotor and said disposed in said casing, said rotor cooperating driven shaft, and means for accomplishing diamwith said casing to establish in said chamber, etral shift of said rotor relatively to said head pump and motor compartments respectively adand to said shaft.

jacent said head and said casing, and being op- 5 12. A transmission device including a driving positely apertured to permit discharge ilow from shaft and an axially alined driven shaft, a drivsaid pump compartment to said motor comparting head secured on said driving shaft, a casing ment and return ow from said motor compartincluding end walls and an annular shell concenment to said pump compartment, pumping blades tric with said shafts, enclosing an end portion carried by said head in cooperative sealing relaof said driven shaft and Venclosing and spaced tion with the end walls of said pump compart-y radially from said head to form an annular chamment, means, which may be centrifugal force. ber therearound, an annular division wall joururging said pumping blades into sealing contact nailed on said head and in said annular shell sepwith the bore wall of said rotor, motor blades cararating said annular chamber` into two longituried by said casing in cooperative sealing relation dinal divisions and defining like divisions of said i with the end walls of said motor compartment, head, said annular wall having in its oppositefaces means urging said motor blades into sealing conkey-ways in symmetrical parallelism with a sinta-ct with the exterior surface of said rotor, a gle diametral plane of said wall, a pair of radidriven shaft journalled in said casing, means carally shiftable rotors disposed respectively in said ried by said shaft, and relatively shiftable means longitudinal divisions of said chamber and around carried by and disposed along the diametral plane said head, each separating its said division proof greatest eccentricity of said rotor effecting gressively outward from said head, into pump driving coupling of said rotor to said driven shaft, and motor chambers; each said rotor including counter-balance means carried by said driven a. disc end and an annular .shell having a bore shaft, and diametrally opposed to the thickest eccentric toits outer surface, each said shell being portion of said rotor shell, and means for diaoppositely apertured between the thicker and metrally shifting said rotor to vary eccentricity thinner portions thereof to establish ports com- ,y

of said rotor relatively to said head and casing, municating said pump and motor chambers and and for coordinately oppositely shifting said carrying keys complementary to said key-Ways, counterbalance means. w alined in parallelism with the respective diametral 11. A hydraulic drive structurey including an planes of greatest eccentricity of said shells, saidV annular casing having oppositely disposed end shells being relatively positioned, with the heavier walls, a radially shiftable and rotatable rotor, Sides 0f Said Shells 0n diametrically opposite sides disposed within said casing and having its oppoof said head, and coupled for power transmission site ends in sealing contact with said casing end and holding in Such relative DOStiOniIlg by er1- walls, said rotor including an annular shell havsagement of said keys with said key-Ways; pump ing a cylindrical bore, and a, cylindrical outer surblades, in groups separated by said annular wall,

face eccentric to said bore, and a disc end at right Carried by said head divisions in resDeCtVe Sealangles to said bore and surface, a, driving shaft; ing contact with the bores and ends of said rotors.

concentric with said casing bore extending 00 and Opposite sides of said annular wall, motor through and journalled in a first said end wall, a blades, in groups separated by said annular wall. driving head secured 0n said shaft within said carried by said casing in respective sealing conrotor bore and having its opposite ends in retact with said casing end walls and opposite sidesl spective sealing contact with said rst end wall of said annular wall, and with the outer surfaces and said rotor disc, the bore of said rotor being of said rotors; means, including rotor carried substantially greater than the diameter of said parts in parallelism with the diametral plane of i head, and the exterior of said rotor of substangreatest eccentricity of said rotor, radially shifttially less diameter than said casing, said rotor able with said rotor relatively to said driving establishing annular chambers respectviely beshaft, effecting driving coupling between one said tween said head and rotor bore, and between said rotor and said driven shaft; and means for shiftrotor and said casing bore, and having opposite lng said rotors radiallyin opposite directions to ports through said shell intermediate the thicker oppositely vary eccentricity of said pump chamand thinner portions thereof, establishing pasbers respectively and concurrently inversely vary sageways between said chambers, blades having eccentricity of said motor chambers respectively. their opposite ends in respective sealing contact 13. A hydraulic drive, including an annular casing, a driving shaft journalled in said casing, a head carried by said driving shaft, and cooperating with said casing to establish an annular chamber, means cooperating with said head and casing to separate said chamber longitudinally into two sections, a pair of substantialliy identical annular rotors, having cylindrical exterior surfaces and eccentric bores, rotatably disposed respectively in said casing sections with the heavier and lighter portions of the one diametrally in- -verted with respect to the other, each said rotor respectively cooperating with said casing and said separating means to establish in its respective said chamber section, pump and motor compartments respectively adjacent said head and said casing, and being oppositely apertured to permit discharge flow from its said pump compartment to its related s'aid motor compartment, and return flow from said motor compartment to said pump compartment; parts c'arried by said rotors, re-

spectively in parallelism with the diametral planes of greatest eccentricity of said rotors, slidably cooperating with said separating means to maintain said diametrally inverted relation and couple said rotors into a rotor unit; pumping blades in sets carried by said head in respective cooperating relation with walls of said pump compartments; motor blades in sets carried by said casing in respective cooperating relation with Walls of said motor compartments; a driven shaft journalled in said casing, means slidably shiftable along the diametral plane of greatest eccentricity of said rotor unit, effecting ,driving coupling of said unit to said driven shaft, and means for diametrally shifting said rotors, in coordinated opposite directions, to vary eccentricity of said rotors relatively to said head and casing while maintaining driving coupling of said rotor unit to said driven shaft.

14. A hydraulic transmission, including a driving member and a driven member, a casing disposed around a rst of said members, an annular rotor externally and internally cylindrical, disposed around said first member and within said casing, segregating in said casing an inner and a radially outer chamber, means establishing passageways for fluid discharge and intake flow between said chambers, means coupling said rotor to the second of said members, means carried by said first member cooperating with the bore of said rotor to divide said inner chamber into a plurality of sectors, means carried by said casing cooperating with the exterior of said rotor to divide said outer chamber into a plurality of sectors, and means for shifting said rotor with respect to said first member and said casing, to vary inversely the eccentricities of said chambers.

'15. A hydraulic transmission, including a driving member and an axially alined driven member, a casing disposed around a first of said members, an annularrotor externally and internally cylindrical, disposed around said rst member and within said casing, segregating in said casing an inner and a radially outer chamber, means establishing passageways for uid discharge and intake flow between said chambers, means coupling said rotor vto the second of said members: means carried by said first member cooperating with the bore of said rotor to divide said inner chamber into a plurality of sectors, means carried by said casing cooperating with the exterior of said rotor to divide said outer chamber into a plurality of sectors, counter-balance means carried by said second member, means 16 for shifting said rotor with respect to said members and said casing, to vary inversely the eccentricitics of said chambers, and complementary means for oppositely shifting said counter-balance means.

16. A hydraulic transmission, including a driving member and a `driven member, a casing disposed around a first of said members, an annular rotor externally and internally cylindrical disposed around said first member and within said casing, segregating in said casing an inner and a radially outer chamber, oppositely disposed ports through said ,rotor wall establishing passageways for fluid discharge and intake flow between said chambers, means shiftably coupling said rotor to the second said member for maintaining driving connection therewith, means carried by said rst member cooperating with the' bore of said rotor to divide said inner chamber into a plurality 0f sectors, means carried by said casing cooperating with the exterior of said rotor to divide said outer chamber into a plurality of sectors, and means for shifting said rotor from concentricity with said first member into eccentricity therewith in either opposite direction.

17. A transmission device, including a driving member and an axially alined'driven member, a casing, including end walls and a shell, spaced radially from a first of said members to form a chamber therearound, a rotor disposed in said casing and around said first member, said rotor comprising annular shells internally and externally cylindrical, dividing said chamber into inner and outer compartments, and wall means interposed between said shells slidably coupling said shells together, for shift in parallel diametral direction, and dividing said compartments longitudinally into sections, means establishing communication between the inner and outer compartments of said sections each respectively, means carried by said rst member dividing said inner compartment sections each respectively, into a plurality of sectors, means carried by said casing dividing said outer compartments sections each respectively, into a plurality of sectors, means effecting shiftable coupling of said rotor to the second of said members, and means for shifting said shells in equal and diametrically opposite directions, while maintaining said coupling to said second member.

18. A transmission device, including axially alined driving and driven members, a casing enclosing and spaced radially from said driving member to form a chamber therearound, a rotor disposed in said casing and around Said driving member, said rotor including annular shells internally and externally cylindrical, and means for slidably coupling said shells together and for dividing said chamber longitudinally into sections, said shells dividing said sections respectively into inner and outer compartments, means establishing communication between respective inner and outer said compartments of each section, means carried by said driving member, dividing said inner compartments each respectively into a plurality of sectors, means carried by said casing dividing said outer compartments respectively into a plurality of sectors, means effecting shiftable coupling of said rotor to said driven member, means for shifting said shells in equal and diametrically opposite directions, while maintaining said coupling to said driven member.

19. A hydraulic transmission, including a driving member and a driven member, a casing disposed around a-first of said members, annular rotors externally and internally cylindrical disposed within said casing in end-on relation around said first member and in diametrically opposed counter-balancing relation, means disposed between adjacent rotors dividing said casing longitudinally` into compartments, said rotors segregating said compartments each respectively into an inner and a radially outer section, means establishing passageways for iluid discharge and intake flow between the said sections of each compartment respectively, means shiftably coupling adjacent ones of said rotors in driving relation together and to the second of said members. for diametral shift; in parallelism, means carried by said rst member cooperating with the bores of said rotors to divide the inner said compartment sections each respectively into a plurality of sectors, means carried by said casing cooperating withI the exterior of said rotors to divide the outer of said compartment sections each respectively into a plurality of sectors, and means for shifting adjacent ones of said rotors equally and oppositely, the one with respect to the other, and with respect to said first member and said casing, to vary inversely the eccentricities of said inn'er and outer sections, and promote rotational balance.

20. A hydraulic transmission, including a driving member and an axially alined driven member, a casing disposed around said driving member, a pair of substantially identical annular rotors externally and internally cylindrical, disposed within said 'casing in end-on relation around said ilrst member and in diametrically opposite counter-balancing relation, means disposed between adjacent rotors dividing said casing longitudinally into compartments, said rotors segregating said compartments each respectively into an inner and a radially outer section, means establishing passageways for fluid discharge and intake flow between the said sections of each compartment respectively, means shiftably coupling said rotors in driving relation together, and to the second of said members, for diametral shift in parallelism, means carried by said rst member cooperating with the bores of said rotors to divide the inner said compartment sections each respectively into a plurality of sectors, means carried by said casing cooperating with the exterior of said rotors to divide the -outer of said compartment sections each respectively into a plurality of sectors, and means for shifting said rotors oppostely, the one with respect to the other, and with respect to said driving member and said casing, to vary inversely the eccentricities of said inner and outer sections, and promote rotational balance, said rotors being disposed in diametrically opposite symmetrical relation.

21. A variable speed hydraulic drive, including a drum having outwardly urged movable blades, a surrounding casing having inwardly urged movable blades, an annular rotor internally and externally cylindrical interposed between said drum and casing to establish pump and motor sections, said rotor cooperating with said blades and being radially shiftable with respect to said,v

4 containing casing, said pump casing including a cylindrically bored and externally cylindrical,

radially shiftable, and rotatable wall member, forming the rotor of said motor, and a drum surrounded by said wall member, said drum having movable blades outwardly urged into Contact with the bore of said wall member, said motor including a shell surrounding said wall member, and having movable blades inwardly urged into contact with the exterior surface of said wall member, means establishing passageways between said pump and motor casings, and means for shifting said wall member at option diametrically from concentricity with said drum into opposite positions of eccentricity therewith.

23. A uid power transmission, comprising a rotary pump and a rotary motor having axially alined shafts, said pump including a shaft driven assembly and said motor including a shaft surrounding reaction assembly, said pump and motor including a rotary member in common cooperating as a reaction member with said pump assembly, and as a driven member with' said motor reaction assembly, said rotary member being radially shiftable with respect to said shafts and coupled in driving relation to said motor shaft, and means for shifting said rotary member to vary inversely said pump and motor capacities.

24. A hydraulic drive comprising a variable capacity pump including a rotor, and-a variable capacity motor, including a reaction housing, which said pump and motor include a radially shiftable rotary member in common, which is the reaction housing of said pump and the rotor of said motor.

25. In a fluid drive, a variable capacity pump including a rotor, and a variable capacity, rotary motor including a reaction housing, said pump and motor including a radially sliiftable rotatable member enclosing said pump rotor and cooperating as a reaction member therewith, and which said member is housed by, and cooperates as a rotor with said motor housing.

26. A iluid power transmission comprising variable capacity rotary pumps and variable capacity rotary motors, said pumps including a driven member and radially shiftable rotatable members housing and cooperating as reaction members therewith, said motors including reaction housings, said pump reaction members forming the rotors of said motors, and being mounted in and cooperating with said motor housings.

27. A iiuid power transmission comprising a variable capacity pump including a driven assembly and a variable capacity motor, including a reaction housing assembly, said pump and motor including a laterally shiftable rotary mem,- ber in common, housing and cooperating as a reaction member with said driven assembly of said pump, and housed byv and cooperating as a driven member with said reaction housing assembly of said motor.

28. Av uid power transmission comprising a variable capacity pump including driven pumping means, and a variable capacity motor includy with said motor reaction means'.

HARRY B. BREEDLOVE.

(References on following page) Number REFERENCES CITED 1,779,757 2,159,941 The following references are of record in the file of this patent:

Number UNITED STATES PATENTS 148,876 Number Name Date 221.749 466,662 Duncan Jan. 5, 1892 477,023 1,497,741 Schneider June 17, 1924 10 361.221 1,604,321 Schneider Oct. 26, 1926 624,254

Name Date Streckert Oct. 28. 1930 Guinness May 23, 1939 FOREIGN PATENTS Country Date Great Britain Sept. 1, 1921 Great Britain Sept. 18, 1924 Great Britain Dec. 20, 1937 Germany Oct. 12, 1922 Germany Jan. 20, 1936 

